> management is right to ask for estimates.

True, but there needs to be common understanding that they are estimates, and if the projects take consistently longer, it means the dev is bad at estimating, not bad at writing software[0]. Also, if you get a median time, you'll have, by definition, half the projects taking longer than that; a mean, mode, or 90th estimate will still have plenty of high points; and if you want 100th percentile, you don't even need to ask the developer: "sometime in the next century, probably".

0: They can be that, too, but that's a independent flaw from being bad at estimating.